CN1315310C - Optical label switching structure supporting blocking mode and multiplexing control - Google Patents
Optical label switching structure supporting blocking mode and multiplexing control Download PDFInfo
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- CN1315310C CN1315310C CNB2004100892698A CN200410089269A CN1315310C CN 1315310 C CN1315310 C CN 1315310C CN B2004100892698 A CNB2004100892698 A CN B2004100892698A CN 200410089269 A CN200410089269 A CN 200410089269A CN 1315310 C CN1315310 C CN 1315310C
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Abstract
The present invention relates to an optical label switching structure supporting block mode and multiplex control, which belongs to the technical field of optical communication. In the structure, a computer terminal is connected with an optical label switching fringe node which is connected to an optical label switching core node, wherein an electronic input-output line card is connected to an optical packet packing/unpacking processor in the optical label switching fringe node, and the optical packet packing/unpacking processor is simultaneously connected with an optical label head generation module and a wavelength division multiplexer. In the optical label switching core node, optical fibers reaching the optical label switching core node are respectively connected to an input end of an optical label receiving/transmitting processor and an optical switch switching matrix through an input wavelength division multiplexer, and an output end of an optical label receiving/transmitting processor and an output end of the optical switch switching matrix are connected to an output wavelength division multiplexer. The present invention realizes the flexible access control of any independent data flow by introducing a block mode and a multiplex mode under the condition of high-speed multimedia video stream between the computer terminal and the optical label switching fringe node.
Description
Technical field
What the present invention relates to is a kind of network configuration that is used for the optical communication technique field, relates in particular to a kind of signal switching fabric of supporting blocking model and multiplexed control.
Background technology
The light exchange can be divided into the circuit switching and the light packet switching dual mode of wavelength route.The former light switch mode is a circuit switched, and basic switching building is a call, and the bandwidth of whole call is a two-way reservation.The major defect of this exchanged form is: must at first set up the wavelength routing channel before data transmit, and channel wavelength is occupied always, is released until finishing.Yes the light packet switching of even more ideal light exchanged form.It is divided into the fixing light load group of length with optical information, adds that then the light of carrying routing iinformation believes that it is that the light grouping transmits that head constitutes the optical information bag that has set form one by one.Optical packet switching technique is directly realized the packet switching of small grain size on photosphere, have little expense, high bandwidth utilization, to transmitting advantages such as information format is transparent, some progress have been obtained in recent years, the optical packet switching technique of the multi-wavelength light mark mode that the someone proposes.In the multi-wavelength light label switching, optical packet head is made up of some light pulses with different wave length, the different routing iinformation of various combination representative of these light pulses.The carrier wave of light load belongs to same wavelength channel in the wavelength of this optical packet head light pulse and the light grouping, not the outer wavelength resource of occupying volume.At the switching node place, realize the light wave Route Selection by judgement to the combination of packets headers light pulse different wave length.
Find through literature search prior art, people such as Shilin Xiao are at " IEEE PhotonicsTechnology Letters " (Institute of Electrical and Electric Engineers photon technology wall bulletin) 2003,15 (4): " Realization of Multi-wavelength Label OpticalPacket Switching " (realization of multi-wavelength mark light packet switching) delivered on the 605-607, just signal switching system the simplest of mentioning in this article, can not carry out real-time terminal control to the light bag, can't distinguish the priority service class at fringe node, the packing that can't finish the light bag is unpacked and the signal head of arbitrary data stream adds, and sophisticated functions such as signal and light bag time and the time-delay of light inter-packet gap be able to programme, this has seriously limited the intelligent and flexibility of signal exchange, even influence overall optical label switched system real-time characteristic and cause the signal switching network to be paralysed.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of signal switching fabric of supporting blocking model and multiplexed control is provided, by between terminal and signal exchange fringe node, introducing the independent data stream controlling mechanism, make them under signal exchange fringe node blocking model and multiplexed two kinds of patterns, finish based on the luminiferous ether bag of prioritization the packing He Guangbao time delay control able to programme of unpacking, guarantee that light wraps in switching and the control of signal exchcange core node realization based on the microsecond level, promotes the performance of overall optical tag switching network.
The present invention is achieved by the following technical solutions, the present invention includes: signal exchange fringe node, signal exchcange core node and terminal, its annexation is: the terminal that is used for video display connects signal exchange fringe node, signal exchange fringe node links to each other with signal exchcange core node by optical fiber, between signal exchcange core node and the signal exchcange core node through optical fiber interconnections.
Signal exchange fringe node structure is divided four parts: electronics input and output ply-yarn drill, the packing of light bag unpack processor, signal head generation module and wavelength division multiplexer.The video terminal Business Stream links the light inlet bag packing processor of unpacking by the electronics input-output line, the light bag packing processor of unpacking is connected with wavelength division multiplexer with signal head generation module simultaneously, signal head generation module output light signal inserts wavelength division multiplexer by optical fiber with the light bag packing processor light pack receiving and transmitting of unpacking then, and wavelength division multiplexer links to each other with signal exchcange core node by optical fiber.
Signal exchcange core node structure divides four parts: incoming wave division multiplexer, signal transmitting-receiving processor, optical switch switching matrix and output wave division multiplexer.The optical fiber that the incoming wave division multiplexer will arrive signal exchcange core node connects signal transmitting-receiving processor input and optical switch switching matrix input separated light mark head and light bag payload respectively, output all is connected the output wave division multiplexer to the output of signal transmitting-receiving processor with the optical switch switching matrix, and the signal head and the light bag payload after the exchange that newly produce is multiplexing after optical fiber is connected into the signal switching network.
Described terminal and the light bag packing processor of unpacking, terminal encapsulates data, time-delay and terminal address into and sends the signal exchange fringe node light bag packing processor of unpacking in the packet under the camera shooting and video situation, terminal can send independent controlling packet under the high-speed multimedia video flowing, attributes such as light packet delay, destination address and service priority are controlled in the light bag packing processor processing terminal control information under blocking model and multiplexing modes of unpacking in real time.Realize that the terminal of independent data control and the packing of the signal exchange fringe node light bag processor of unpacking is a key character of the present invention.
The present invention is based on above architectural feature, the low speed camera of a plurality of terminals is caught or the high-speed multimedia video flowing exports signal exchange fringe node to 10M/100M electronics ether packet format, signal exchange fringe node is handled in real time it is packaged into the luminiferous ether bag of 1Gbps, and, each light bag behind optical WDM, enters core light tag switching network exchange transmission for adding the signal head, the luminiferous ether of band signal head wraps in signal exchcange core node place and only the signal head is carried out the conversion of photoelectricity light, signal processor is finished signal identification and to the control of optical switch switching matrix in electric territory, the driving that light wraps in control signal down directly by the exchange of optical switch switching matrix then with upgrade after the signal head multiplexingly advance Optical Fiber Transmission to next signal exchcange core node.After the light bag arrived outlet signal exchange fringe node, light bag elder generation demultiplexing was reduced to 10M/100M electronics ether bag to the light bag and sends to object-computer terminal display of video streams again through the signal exchange fringe node light bag packing processor of unpacking then.
In the above on the basis to signal switch network architecture feature description, between terminal of the present invention and signal exchange fringe node, and signal exchange fringe node and the signal exchcange core intra-node course of work and principle are further described:
1) terminal is under low speed shooting signal acquisition situation, catching image pickup signal directly is packaged into the electric ether bag that comprises delayed data, source and destination terminal address information and service priority information and converges and enter the signal exchange fringe node that is attached thereto, the video flowing from terminal is received in the clamping of signal exchange fringe node electronics input-output line, and the light bag packing processor of unpacking is packed in different service convergence formations according to light packet delay parameter, service priority and terminal address information that electric ether bag carries;
2) terminal only sends independent video flowing controlling packet and pure video packets of data to signal exchange fringe node under high-speed multimedia video flowing situation.Based on this mechanism to signal exchange fringe node receiving computer terminal controlling packet and packet, the present invention divides into blocking model and multiplexing modes with it, blocking model is meant that pure video streaming data packet and video controlling packet are sent to the same port of signal exchange fringe node simultaneously, multiplexing modes then is that signal exchange fringe node receives at independent port controlling packet, has improved input and output electronics ply-yarn drill port utilization ratio with regard to having reduced unpack time of processor reception congestion wait of signal exchange fringe node light bag packing like this.Controlling packet all comprises light packet delay information, source terminal address, purpose terminal address information and service priority differentiation information under these two kinds of patterns, the light bag packing processor of unpacking is handled the control information identification that receives in real time equally like this, thereby real time altering high-speed multimedia video flowing is packaged into terminal address route, light packet priority and the light packet delay timing controlled information of light bag, finishes real-time terminal high-speed video stream traffic and converges and send.
The packing of light bag is unpacked processor with above-mentioned low speed shooting seizure vision signal and high-speed multimedia video flowing buffer memory in fast storage, service time, the two dimensional constraint of timer and maximum light packet length triggered corresponding data queue, satisfy the back light bag packing processor output drive level control laser array of unpacking at light bag formation overflow condition and produce signal, under processor timer accurate timing is unpacked in the packing of light bag, signal head and light bag are launched through strict multiplexing afferent echo division multiplexer of the time interval then.The light bag packing processor of unpacking can be controlled blanking time of continuous two light bags equally, and the 1G luminiferous ether bag that promptly converts band signal head to from the 10M/100M video ether bag of electronics input and output ply-yarn drill after signal exchange fringe node is handled enters signal exchcange core optical-fiber network like this.Equally, inverse process is forwarded to corresponding calculated machine terminal through electronics input and output ply-yarn drill thereby the light bag execution that the signal exchange fringe node process of unpacking only need receive is packed.Signal switching network signal exchcange core node receives the gigabit ether light bag from the band signal exchange head of adjacent signal exchange fringe node or signal exchcange core node, through incoming wave division multiplexer separated light mark head and luminiferous ether payload, the signal head enters signal transmitting-receiving processor, finish opto-electronic conversion at signal head and light bag payload in blanking time, and high-velocity electrons are handled and are produced corresponding driving signal of telecommunication control optical switch switching matrix, light bag payload transparent optical switch switching matrix that passes through under the control of drive circuit is finished full light exchange, the processor of signal transmitting-receiving simultaneously is at the emission of electric area update label information drive laser again signal, the light bag payload of new signal and the output of optical switch switching matrix in blanking time together through the multiplexing next node that outputs to of output wave division multiplexer.
The present invention has improved terminal and the signal exchange fringe node light bag packing processor structure of unpacking, realized real-time terminal control to the light bag, in the packing of signal exchange fringe node differentiated service class priority, having finished the packing of light bag unpacks, the signal of arbitrary data stream adds, sophisticated functionss such as signal and light bag time and the time-delay of light inter-packet gap are able to programme, improve the intelligent and flexibility of signal exchange greatly, but improved overall optical label switched system real-time characteristic and extended attribute.The realization that the packing of light bag is unpacked more helps bringing into play the big capacity of signal switching network, and the advantage of high-speed light exchange has also reduced signal exchcange core node blocking rate and competition simultaneously, has optimized network performance.
The present invention is on the basis of simple optical label switched demo system, design has proposed to support the signal switching fabric of terminal control under arbitrary data stream blocking model and the multiplexing modes, between user terminal and edge access node, introduce the independent data stream controlling mechanism, thereby under signal exchange fringe node blocking model and multiplexed two kinds of patterns, can finish based on the luminiferous ether bag of prioritization the packing He Guangbao time delay control able to programme of unpacking, realize the access control of any independent data stream, guarantee that light wraps in switching and the control of signal exchcange core node based on the microsecond level, improved signal switching network bandwidth availability ratio, increase the intelligent of signal exchange fringe node, make full use of the buffer memory flexible nature of electricity layer, improve the adaptive ability of network, simplify the control and the management of core optical networks, promote the performance of overall optical tag switching network and the powerful control ability that multiple business is inserted, strengthened the robustness of signal switching network self.
Description of drawings
Fig. 1 signal switch network architecture of the present invention figure
Wherein, the edge is a signal exchange fringe node, and core is a signal exchcange core node.
Fig. 2 signal exchange fringe node (a) of the present invention and signal exchcange core node (b) structure chart
The data packet format that Fig. 3 terminal of the present invention sends
Wherein, (a) for low speed shooting signal acquisition pocket of electrons form, (b) being high-speed multimedia video flowing controlling packet form, (c) is high-speed multimedia video flowing clear data packet format.
Embodiment
As shown in Figure 1, signal switch network architecture of the present invention comprises: terminal 1, signal exchange fringe node 2, signal exchcange core node 3, its annexation is: four terminals 1 connect signal exchange fringe node 2, three signal exchcange core node 3 interconnection, link to each other with three corresponding signal exchange fringe nodes 2 simultaneously, two signal exchange fringe nodes 2 connect two terminals 1 respectively in addition.Low speed shooting signal acquisition that four terminals 1 produce separately or high-speed multimedia video flowing converge with 10M/100M electricity ether packet format and insert signal exchange fringe node 2, the vision signal of terminal converges back being classified according to service class priority and destination address at signal exchange fringe node 2 and is packaged into gigabit luminiferous ether bag, signal exchange fringe node 2 also is that each light bag adds a signal head, under precise delay control, send the luminiferous ether bag of complete band signal head to signal exchcange core node 3, the transparent exchange of signal exchcange core node 3 pairs of signal photoelectricity light real-time processing controls luminiferous ether payload, the light bag arrives signal exchange fringe node 2 separately respectively, finishes to unpack and transmit original electric ether bag to purpose terminal 1 and echo video.
Fig. 2 (a) has provided signal of the present invention exchange fringe node structure chart, and signal exchange fringe node is made of unpack processor 5, signal head generation module 6 and wavelength division multiplexer 7 four parts of electronics input and output ply-yarn drill 4, the packing of light bag.Electronics input and output ply-yarn drill 4 receives 10M/100M electricity ether packet from terminal and is transmitted to the light bag packing processor 5 of unpacking, the light bag packing processor 5 of unpacking is dispensed to corresponding data centralization formation queuing according to the service priority and the purpose terminal address of video packets of data, utilization is based on the two dimensional constraint assemblage method of threshold value and time, sealing dress when a light finishes the back light bag packing processor 5 of unpacking and drives signal head generation modules 6 and launch signals, after passing through the strict timing of light bag mark head and light bag payload interval simultaneously, send gigabit luminiferous ether bag and first multiplexing wavelength division multiplexer 7 that enters of signal and export through optical fiber.Equally, the light of band signal head wraps in Egress node and demultiplexes into the pure luminiferous ether packet of gigabit to the light bag packing processor 5 of unpacking through wavelength division multiplexer 7, the light bag packing processor 5 of unpacking unpacks reduction of data according to packetization rules to be original 10M/100M vision signal, to deliver to electronics input and output ply-yarn drill 4 and be forwarded to the corresponding target terminal.Fig. 2 (b) is signal exchcange core node structure figure, and signal exchcange core node is made of incoming wave division multiplexer 8, signal transmitting-receiving processor 9, optical switch switching matrix 10 and output wave division multiplexer 11.The gigabit luminiferous ether bag that carries the signal head of signal switching network enters signal exchcange core node 3 and at first through incoming wave division multiplexer 8 signal head and light bag payload difference demultiplexing to signal is received and dispatched processor 9 and optical switch switching matrix 10, at signal head and light bag payload in blanking time, the signal head is arranged to corresponding state through after the opto-electronic conversion driven optical switch switching matrix 10 is discerned and handled to the electronics header in signal transmitting-receiving processor 9, the light bag payload that arrive in this moment does not need buffer memory and waits for and directly finish the transparent optical exchange in the optical switch switching matrix 10 that pre-sets, its output is connected into output wave division multiplexer 11, signal transmitting-receiving processor 9 has also upgraded label information simultaneously, and the emission signal is connected into output wave division multiplexer 11 and sends after multiplexing blanking time of light bag payload in advance.
Fig. 3 has provided packet and the controlling packet form that transmits between terminal and signal exchange fringe node.Lattice are represented the data of a byte, and in the low speed shooting signal acquisition pocket of electrons form (a), byte 1 and 2 these electric video bags of expression are after the fringe node packing, and the time delay value between the luminiferous ether bag, unit are microseconds.Byte 3 expression purpose terminal addresss, the priority of byte 4 these service class of expression, byte 5 expression source computer terminal addresss, byte 6 and 7 is left following definition and uses, and the part of numeral 8 is represented the video capture payload user data.Terminal adopts this packet format under low speed shooting signal acquisition situation, terminal sends the electric ether bag comprise delay value 1 and 2, source address 5 and purpose terminal address 3 and service priority information 4 and converges and enter the signal exchange fringe node that is attached thereto, the video flowing from terminal is received in the clamping of signal exchange fringe node electronics input-output line, and unpack light packet delay value, service priority and terminal address information that processor carries according to electric ether bag of light bag packing is packed in different service convergence formations and set light bag fixed time interval; In the high-speed multimedia video flowing controlling packet form (b), byte 1 is to byte 5 and (a) same meaning, and byte 6 keeps to byte 8 to be used; In the high-speed multimedia video flowing clear data packet format (c), video streaming data packet 1 can be the pure video data that defines arbitrarily.Terminal uses independent controlling packet (b) and packet (c) under high-speed multimedia video flowing situation, based on this machine-processed the present invention it is divided into blocking model and multiplexing modes to signal exchange fringe node receiving computer terminal controlling packet and packet, blocking model is meant that pure video streaming data packet and video controlling packet are sent to the same port of signal exchange fringe node simultaneously, multiplexing modes then is that signal exchange fringe node receives at independent port controlling packet, the light bag packing processor of unpacking is handled the control information identification that receives in real time equally, thereby real time altering high-speed multimedia video flowing is packaged into the terminal address route of light bag, light packet priority and light packet delay timing controlled information are finished real-time terminal high-speed video stream traffic and are converged and send.
The signal switching fabric that the present invention proposes has been received good effect in actual tests, terminal low speed shooting lock-on signal and high-speed multimedia video flowing be the packing signal switching network echo of unpacking through timing controlled, and video flowing is unobstructed, and video quality is good.Next step research work can be based on this packing able to programme multinode network structure of unpacking, and adds fibre delay line, wavelength shifter and utilizes method such as deflection route fully to study characteristic and the signal switched network performance that signal exchanges this advanced technology.
Claims (4)
1, a kind of signal switching fabric of supporting blocking model and multiplexed control, comprise: terminal (1), signal exchange fringe node (2) and signal exchcange core node (3), it is characterized in that, signal exchange fringe node (2) is by electronics input and output ply-yarn drill (4), the light bag packing processor (5) of unpacking, signal head generation module (6) and wavelength division multiplexer (7) constitute, electronics input and output ply-yarn drill (4) and the light bag packing processor (5) of unpacking links to each other, the light bag packing processor (5) of unpacking is connected with wavelength division multiplexer (7) with signal head generation module (6) simultaneously, electronics input and output ply-yarn drill (4) receives external electronic data bag and sends into the light bag packing processor (5) of unpacking and be packaged into the light bag, drive signal head generation module (6) output light signal with the time bag packing electric marking signal of processor (5) output of unpacking, this signal inserts wavelength division multiplexer (7) by the light bag of optical fiber after unpacking processor (5) packing through the packing of light bag, wavelength division multiplexer (7) links to each other with signal exchcange core node (3) by optical fiber, signal exchcange core node (3) is by incoming wave division multiplexer (8), signal transmitting-receiving processor (9), optical switch switching matrix (10) and output wave division multiplexer (11) constitute, signal transmitting-receiving processor (9) all links to each other with output wave division multiplexer (11) with incoming wave division multiplexer (8) with optical switch switching matrix (10), light signal in the input optical fibre is separated into signal head and light bag payload behind incoming wave division multiplexer (8) demultiplexing, signal head and light bag payload are input to signal transmitting-receiving processor (9) and optical switch switching matrix (10) by optical fiber respectively, the light bag payload that signal transmitting-receiving processor (9) will be handled after new signal head that produces in back and the exchange is multiplexing after optical fiber is input to the signal switching network, and signal exchange fringe node (2) connects terminal (1).
2, the signal switching fabric of support blocking model according to claim 1 and multiplexed control, it is characterized in that, described terminal (1), under low speed shooting signal acquisition situation, the electric ether bag that comprises time-delay, address and precedence information converges and enters signal exchange fringe node (2), and the signal exchange fringe node light bag packing processor (5) of unpacking is packed in the service convergence formation according to light packet delay parameter, service priority and terminal address information that electric ether bag carries; Under high-speed multimedia video flowing situation, terminal (1) sends independent video flowing controlling packet and pure video packets of data to signal exchange fringe node (2).
3, the signal switching fabric of support blocking model according to claim 2 and multiplexed control, it is characterized in that, controlling mechanism between terminal (1) and the signal exchange fringe node (2) is divided into blocking model and multiplexing modes, blocking model is meant that pure video streaming data packet and video controlling packet are sent to the same port of signal exchange fringe node (2) simultaneously, multiplexing modes then is that signal exchange fringe node (2) receives at independent port controlling packet, the packing of light bag is unpacked processor (5) to control information identification processing, real time altering high-speed multimedia video flowing is packaged into the terminal address route of light bag, light packet priority and light packet delay timing controlled information are finished the terminal high-speed video stream traffic and are converged and send.
4, the signal switching fabric of support blocking model according to claim 1 and multiplexed control is characterized in that, between signal exchcange core node (3) and the signal exchcange core node (3) through optical fiber interconnections.
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| CNB2004100892698A CN1315310C (en) | 2004-12-09 | 2004-12-09 | Optical label switching structure supporting blocking mode and multiplexing control |
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| CNB2004100892698A CN1315310C (en) | 2004-12-09 | 2004-12-09 | Optical label switching structure supporting blocking mode and multiplexing control |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2014161291A1 (en) * | 2013-04-03 | 2014-10-09 | 华为技术有限公司 | Data scheduling and switching method, apparatus, and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101330485B (en) | 2007-06-20 | 2013-02-27 | 华为技术有限公司 | Optical identification as well as method and device for modulating and demodulating the same |
| WO2015109606A1 (en) * | 2014-01-27 | 2015-07-30 | 华为技术有限公司 | Data exchange device and system |
| CN107645647A (en) * | 2017-09-21 | 2018-01-30 | 京信通信系统（中国）有限公司 | A kind of multichannel audio-video frequency transmission method and device |
| CN110166855B (en) * | 2019-04-26 | 2021-09-07 | 东南大学 | All-optical route transmission method taking radio-frequency signal as pilot and system adopting same |
| CN114619962A (en) * | 2022-03-15 | 2022-06-14 | 上海赫千电子科技有限公司 | Automatic driving system with asymmetric transmission |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1380561A (en) * | 2001-04-11 | 2002-11-20 | 中国科学院电子学研究所 | Optical mark production and extraction device |
| CN1387329A (en) * | 2002-07-15 | 2002-12-25 | 北京大学 | Multi-granularity light switch based on label |
| US20040175175A1 (en) * | 2003-03-03 | 2004-09-09 | Antoniades Neophytos A. | Optical packet router for an optical node in a packet switched WDM optical network |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1380561A (en) * | 2001-04-11 | 2002-11-20 | 中国科学院电子学研究所 | Optical mark production and extraction device |
| CN1387329A (en) * | 2002-07-15 | 2002-12-25 | 北京大学 | Multi-granularity light switch based on label |
| US20040175175A1 (en) * | 2003-03-03 | 2004-09-09 | Antoniades Neophytos A. | Optical packet router for an optical node in a packet switched WDM optical network |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2014161291A1 (en) * | 2013-04-03 | 2014-10-09 | 华为技术有限公司 | Data scheduling and switching method, apparatus, and system |
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